A chemical catalyst is a substance that lowers the required activation energy of a reaction. The activation energy is the amount of energy required to activate or start a pr â¦ ocess, this can be in the form of many things, such as heat. catalyst accelerates the process of a chemical reaction. If a reaction is a slow one then by introducing a catalyst would speeden up the process. For example :- The reaction â¦ between hydrogen and nitrogen to create ammonia is a slow reaction. Finely divided iron act as a catalyst.
For other uses, see Boatswain (disambiguation). A boatswain (/ËboÊsÉn/, formerly and dialectally also /ËboÊtsweÉªn/), bo's'n, bos'n, or bosun, also known as a Petty Officer or a qualified member of the deck department, is the seniormost rate of the deck department and is responsible for the components of a ship's hull.
Boatswainâs Mate, the oldest rate in the Navy, has a rich history of honored traditions. BMâs are the leaders and backbone of every shipâs crew. A Boatswains Mate maintains the exterior surfaces of ships, deck handling machinery and equipment, handle cargo and operate small boats during a number of evolutions including Anti-Terrorism Operations and Maritime Interdiction boardings of suspect ships. Stand watch as helmsman, lookouts, and Boatswain Mate of the Watch.